I agree its not recommended to use any kind of powder, because this contains talc which is suspected to contribute to ovarian cancer. It can also clog the pores more. Buy some plain Epsom Salts and run a hot bath. Baths can be bad and cause UTI's if not done properly because bacteria from the rear region can go in the water........ so here's how to do it safely. Shower and soap the lower region, clean your bathtub first...then put 2 cups of Epsom Salts and soak for 30 mins. When you're sleeping let the area breath, so don't wear underwear and let that area breath as much as possible. You can even use a blow dryer to fully dry after showering.

If this doesn't improve or gets larger or more painful, this might be a boil or staph infection or an ingrown hair as mentioned above. If it gets worse then do tell your doctor. You could also try Tea Tree Oil soaked on some gauze and apply / leave in place - only use this on the outer area of course. Don't try to squeeze it. Always wear cotton underwear and stay away from nylon ones. Although thongs might look good for some, bacteria can migrate along the string and cause infections. Hope this gets better soon and see your doctor if this doesn't go away on its own.